Study of simian immunodeficiency virus yields insight into varied reaction to virus in humans.

Formula-fed infants experience metabolic stress that puts them at risk for obesity, diabetes and other health problems.

Panel recommends new, personalized strategies to reduce overtreatment of malignancies

Link between memory and cravings appears to hold sway over addiction relapse.

Researchers pinpoint mechanism that consolidates information for long-term memory.

Antihistamines used as nausea remedy may carry risk of premature birth, low birth weight.

Team from UCLA's nursing school expands testing among LA's homeless.

Open windows in the classroom helps keep those seats filled.

Fewer neighborhood trees and heat-retaining hard surfaces add up to sweltering conditions for many people of color.

Ultrafine particles, found in a host of common products, are linked to lung inflammation, other damage.

Troubling levels of lead, other toxic metals found in lipstick, lip gloss.

Discovery may point to causes of the throbbing head pain that plagues millions.